US2721184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing activated carbon
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1950-07-11
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Granted: 1955-10-18
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Expires: 1970-07-11
Abstract
No abstract record available.
Inventors
- 👤 Jr Alexis Voorhies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:08
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/30; C01B32/312; C01B32/336; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS FOR THE PREPARATION OF AN IMPROVED ACTIVATED CARBON RESISTANT TO DEACTIVATION UPON CONTACT WITH HYDROCARBON MIXTURES INCLUDING POLYMERIZABLE HYDROCARBONS, WHICH CONSISTS IN ACTIVATING A CARBONACEOUS MATERIAL BY CONTACTING IT WITH STEAM AT A TEMPERATURE OF 900* TO 1600* F. AND THEREAFTER DEOXYGENATING THE STEAM TREATED CARBON BY CONTACTING IT WITH HYDROGEN AT A RATE OF 10 TO 50 S.C.F. PER HOUR PER POUND OF CARBON FOR A PERIOD OF 15 MINUTES TO 4 HOURS AT A PRESSURE NOT ABOVE ATMOSPHERIC AT A TEMPERATURE OF 400* TO 1000* F.
Claim 2
Dependent Claim
90 words
A PROCESS FOR THE PREPARATION OF AN IMPROVED ACTIVATED CARBON RESISTANT TO DEACTIVATION UPON CONTACT WITH HYDROCARBON MIXTURES INCLUDING POLYMERIZABLE HYDROCARBONS, WHICH CONSISTS IN ACTIVATING A CARBONACEOUS MATERIAL BY CONTACTING IT WITH STEAM AT A TEMPERATURE OF 900* TO 1600* F. AND THEREAFTER DEOXYGENATING THE STEAM TREATED CARBON BY CONTACTING IT WITH HYDROGEN AT A RATE OF 10 TO 50 S.C.F. PER HOUR PER POUND OF CARBON FOR A PERIOD OF 15 MINUTES TO 4 HOURS AT A PRESSURE NOT ABOVE ATMOSPHERIC AT A TEMPERATURE OF 400* TO 1000* F.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |